Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dc0bb0e30ce667403d7cf9adaf56bb58375f72892a5fd9dfc074071628a424f' 
  AND token = 'OyOvKEwEDrhGT0tnIzObXohy1qlkOh+auEtxFWQlGrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00093

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}